Werdum would be the most enticing matchup of those three. His improved standup, reach advantage and BJJ should be able to take him to victory, although I still favour the man who bodyslammed Barnett to wrestleskullfuck him to a comfortable decision victory.

Nelson would be a fun fight, but he's even more rotund than Cormier and would probably get pimpslapped standing. Not a very good builder-upper for Cormier either as Nelson's not as well regarded a fighter as he used to be.

Arlovski would get get knocked out touching gloves before the fight. Chin gone, skills not evolved.